A 400 CI V8 in a Monza? Besides cracking the windshield on demand I'm surprised the doors would open or stay closed.
Back to the OP. I would reach back to the insurance, presuming they are demanding an examination, for recommendations regarding who they want to check the chassis and negotiate with them regarding the cost for the same.
What is happening is unusual. Lots of Kountry Star's still on the road that are not eating windshields. Who knows what's going on and cracking windshields could be a symptom of something deeper and more serious that needs attention.
